Vanity shops/restaurant projects by rich spouses are very much a thing in some rich towns as well.

People who are doing it for fun since they have nothing else to do with their time and this also hurt competing businesses that actually need to make money.

That said it would probably be fun way to engage with the community in whatever retirement hobbies you have. Like a daytime cafe / nighttime lounge / listening bar / art gallery thing haha.

You do need some staff you can trust to deal with all the not fun parts. Anyone who has worked retail as a teen knows what that’s like.